Valve lifter



April 16, 1929.

w'. A. GRUBB VALVE LIFTER Filed Jan. 9, 1928 2 Sheets-Sheet "uni-2". Illllllllllllillllll f- WITH/5555 April 16, 1929; w. A. GRUBB 1,709,528

VALVE LIFTER Filed Jan.9, 1928 2 Sheets-Sheet. 2

Illllllllllllllllllll -llllllllllll ll Wam um-m Ill mum mum II [1 ll I Patented Apr. 16, 1929.

UNITED STATES WESLEY A. enunnormrnnnn, NEBRASKA,

VALVE LIFTER.

Application filed January 9, 1928. Serial No. 245,555

This invention appertains to spring compressors and more particularly to a novel tool for compressing the springs of the valves of I movable jaw and novel means for locking the movable jaw in an adjusted position against accidental displacement.

'A'further object of the invention is the provision of a novel carriage or casing. carrying the movable jaw, the carriage or casing being constructed to snugly receive the rackbar of the frame and to prevent lateral shifting movement of the movable jaw.

, A further object of the invention is the provision of a novel jaw for engaging the bottom of the valve spring to be compressed,

spring against shifting movement.

A further object of the invention is provision of novel means for associating the spring engaging jaw with the shank or arm of the frame, whereby the jaw can be con veniently removed and replaced when so desired.

A still further object of the invention is to provide an improved valve spring compressor and remover of the above character,

the jaw functioning to positively hold the which will be durable and eflicient in use,-

one which will be simple and easy to manufacture and one which can be placed upon the market at a reasonable cost.

With these and other objects in view, the invention consists in the novel construction, arrangement and formation of parts, as will be hereinafter more specifically described, claimed and illustrated in the accompanying drawings, in which drawings:

Figure 1 is a side elevation of the improved tool, showing the same in use,

Figure 2 is a top planview of thetool, Figure 3 is a horizontal section through the tool, taken on the line 33 of Figure 1 looking in the direction of the arrows,

Figure 4 is a vertical section'taken on the line 4-4 of Figure 1 looking in the direction of the arrows,

Figure 5 is a fragmentary detailed section through the sliding carriage or casing of the tool taken on the line 55 of Figure 2 looking in the direction of the arrows,

' Figure 6 is a detailed sectionthrough the lower arm or shank of the frame taken on the line 66 Figure 3 looking in the direction of the arrows,

Figure 7 is a detailed transverse section taken through the upper armor shank of the movable carriage or casing on the line 7-7 of Figure 1.

Referring to the drawings indetail, where- 1n similar reference characters designate corresponding parts throughout the several views, the letter A generally indicates the lmproved tool which is adapted to be used in conjunctionwith an'internal combustion engine B for removing the valve spring 10.

As shown, the valve spring 10 is coiled about the stem 11 of the exhaust or intake valve 12, as the case may be and this spring normally functions to hold the valve 12 on its seat. .The engine has only been shown diagrammatically and in dash lines. The lower end of the spring 10 normally seats upon or.

is retained in position on the stem 11 by the means of a cross key or pin 13 and the spring bearing against the said keyor pin, holds the valve down.

The improved tool A comprises a frame 20 Which includes a rack-bar 21 having rack teeth 22. formed on one longitudinal edge thereof and a right angularly extending arm or shank 23. This arm or shank 23 can be formed on the lower end of the rack-bar 21, if so desired, but as shown,'this arm is constructed independently of the rack-bar and is rigidly connected thereto by the use of angular straps 24, which are riveted or otherwise secured to the rack-bar and the arm.

Slidably mounted upon the rack-bar 21 is the movable carriage or casing 25 and this casing is of a novel construction to insure thcaccurate operation of the tooland to reduce the cost of manufacture thereof. This carriage embodies companion sideqplates 26 and 27 which 7 are preferably formed from sheet metal. Spacing blocks 28 and 29 are arranged between the plates at the opposite diagonal corners thereof and suitable rivets or the like 30 extend through the platesand the blocks. This casing is further spacedand braced by the use of the upper movable arm or shank 31 which extends between the plates at the upper extreme corner thereof and is rigidly and straddles the pinion 36.

connected to the plates by the use of rivets '32 or the like. The outer side edges of'the plates 26 and 27 are provided with arcuate recesses or out-out portions 33, for a purpose which will later appear. Riveted or otherwise "secured to the side plates are supporting arms or straps 34 and these straps extend laterally from the outer edges of the plates and, across the cut out portions 33." These arms or straps 34 support a shaft 35 on which is mounted a pinion 36 for engaging the teeth 22 of the rack-bars 21.

Similar arms or straps 3"? are secured to the plates 26 and 27 below the arms or straps 34 and these straps extend below the plates and are spaced by a block 38.

From the description so far, it can be seen that a strong and rigid housing is formed and that the blocks 23, 29 and 38 andthe arm 31 form an eflicient guide for preventing lateral shifting movement of the carriage or casing on the rack-bar 21.

For facilitating the advancing of the carriage in either direction on the rack-bar 21, a handle 40 is provided. The forward end of the handle 40 is provided with a yoke 41 which is rockably mounted upon the shaft The opposite sides of the yoke 41 support pivoted dogs or pawls 42 and 43 which are normally urged into locking engagement with the pinion by means ofexpansion coil springs 44. It is to be noted that the springs 44 are confined between the handle and thumb pieces 45 formed on the dogs or pawls 42 and 43. By pressing on the thumb pieces 45, the dogs can be swung out of locking engagement with the pinion 36. It is tobe noted, however, that when both of the dogs are engaged with the pinion that movement of the handle in either direction relative to the pinion is prevented in view of the fact that the dogs are oppositely arranged. However, when one dog is thrown out of engagement with the pinion, the pinion can be moved with the handle in one direction but the handle will ratchet over the pinion when moved in the opposite direc tion.

In order to further lock the carriage in an adjusted position on the rack-bar 21 a dog or pawl 46 is pivotally carried directly by the carriage at the lower corner thereof and this pawl is normally urged into engagement with the teeth 22 of the rack bar by means of a spring 47 which is confined between the thumb piece of the dog and the block 38.

V The lower rigid arm or shank 23 has con nected therewith the rigid member 50 which forms an important feature of the present invention. This jaw member 50 is of a yoke shape and is provided with upstanding flanges 51 for engaging the sides of the lowermost convolution of the spring 10 so as to prevent wobbling of this spring during the compressing thereof. The jaw is of such a size as to readily slip under the spring and to engage about the valve stem 11. The inner end of the jaw is provided with an attaching shank 52 which is of a substantially U shape in cross section to receive the rigid shank or arm 23 and the attaching shank is connected to the arm or shank 23' by the use of a suitable cotter pin 53 or the like. By this arrangement the rigid jaw is firmly held in place, but can be readily removeo when it is desired to replace. the same for any reason.

The outer end of the upper arm or movas ble shank 31 has riveted or otherwise secured thereto the rigid. j aw 54 and this aw depends -from said arm and has its lower end pointed as at 55 for engagement with the valve 12. The pointed end {5 is in direct alignment with the axial center of the rigid jaw 50.

In operation of the improved spring compressor the movable jaw 54 is placedin engagement with the valve 12 and the rigid jaw 50 is slipped under the spring 10 around the stem 11. The carriage 25 is now initially adjusted by releasing the pawl 47 and sliding the carriage 25 down on the rack-bar until the pointedend of the rigid jaw engages the valve.

The handle 40 can now be grasped and the pawl 42 is released and upon downward movement of the handle the jaws 54 and 50 will be brought toward one another, consequently compressing the spring 10. The pin or key 13 can now be easily'removed from the stem 11 so as to release the spring and by gradually moving the jaws apart, the spring can be released without ditficulty. After the spring has been released the implement can be pulled away from the valve and stem and the valve can be readily lifted out from the engine. This will permit the necessary repairs or regrinding of the valve seat to be made.

i l hen it is desired to replace the spring an d valve, the valve placed in position with the spring thereon, in expanded condition and the implement is again brought into use with the jaw 54 in engagement with the valve 12 and the jaw 50- in engagement with the lower end of the spring 10. The spring is now compressed and lifted by suitable manipulation of the handle 40 and when the spring has been lifted above the opening for the key or pin 13 this pin or key is slipped into place. The tool can now be released and moved away from the engine.

From the foregoing description, it can be seen that I have provided a durable and eificient tool for facilitating the removal of the valves of internal combustion engines to permit the necessary repairs to be made to their valve seats.

Changes in details may be made without departing from the spirit or the scope of this invention, but: 1

What I claim as new is:

A valve spring compressor comprising a frame including a rack bar and right angularly extending rigid arm, a carriage slidably mounted upon said rack bar including a pair of side plates, and spacing blocks secured to the plates and between the same at the opposite diagonal corners thereof and formlng guards for engaging the rack bar, an out- 10 Wardly extending arm carried by the carriage and secured between said plates at one corner opposite to the spacing blocks, facing jaws secured to the arms, means for advancing the carriage on the rack bar, and releasable means plates at one" corner thereof diagonally 0pposite to the rigid arm for engaging the rack bar and locking the carriage on the rack bar.

In testimony whereof I affix my signature.

WESLEY A. GRUBB.

arranged between the 15 

